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MDE-4334C Atlas Start-up and Service Manual · April 2008
Electronic and Electrical Components
Atlas 8800 Parts
Atlas 8800 Parts
T18994 Pump Interface PCA (Atlas 8800 only)
T18994 Pump Interface PCA connects with the pump controller and pulsers, pump handle
switches, valves, STP signal relays, and electro-mechanical totalizers. Normally, this interface
is with the Pump Controller PCA. However, when an ATC Controller Board is used, the pump
controller interface sends pulser information to the ATC Controller PCA. The T18994
Hydraulic Interface also converts the 24 VAC it receives from the power supply to 14 VDC
for the pump handle feed and 150 VDC for pulsers. The interface re5 VDC from the
Pump Controller PCA and supplies 120 VAC for the valve and STP signals.
shows the STP PCA layout that contains components related to the hydraulic
interface, T18994 G1 Pump Interface PCA.
Figure 6-23: T18994 Pump Interface PCA (Atlas 8800 only)
AT_PumpPCA_interface
P306
P307
P406
P405
P309
P308
P305
PCA Connections and Cables
Connector #
via Cable
to Assembly
at Connector #
P305 (20)
R19952-G1
T20092-G1
P205 (16)
P306 (5)
R19939-G1
T20092-G1
P206 (5)
P307 (10)
R19951-G1
T20092-G1
P207 (10)
P308 (2)
24 VAC
R20333-G1
P309 (12)
T19983
T19983-G1
P604 (4) P601 (3)
P401 (9)
P405 (20)
M04658A001
Q12514-10 (A1)/Q12514-10 (B1)
PH (A1) (4), PH(B1) (4)
R19072 G1
T18350-G3 (A) T18350-G3 (B)
J921B (4), J921A (4)
M04658A001
Q11763-01
(+) (C) (-)
P406 (5)
M04889A001
M00455A003 Grade 1
J922A (4)
M00455A003 Grade 1
J922B (4)